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Finding the Fourth Proportional to 279,387.40, 419,081.10 and 254,455.60

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Solution

The fourth proportional to 279,387.40, 419,081.10 and 254,455.60 is: 381,683.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,387.40 : 419,081.10 = 254,455.60 : x
  2. Step 2: Convert to fraction form
    279,387.40/419,081.10 = 254,455.60/x
  3. Step 3: Cross multiply
    279,387.40x = 419,081.10 × 254,455.60
  4. Step 4: Simplify right side
    279,387.40x = 106,637,532,749.16
  5. Step 5: Solve for x
    x = 106,637,532,749.16/279,387.40
  6. Step 6: Final answer
    x = 381,683.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.